US2826819A

US2826819A - Gauging device

Info

Publication number: US2826819A
Application number: US490568A
Authority: US
Inventors: Robert L Esken
Original assignee: Sheffield Corp
Current assignee: Sheffield Corp
Priority date: 1955-02-25
Filing date: 1955-02-25
Publication date: 1958-03-18
Anticipated expiration: 1975-03-18

Description

March 18, 1958 R. ESKEN I GAUGING DEVICE 2 Sheets-Sheet 1 Filed Feb. 25, 1955 ,INVENTOR.

Z JM 1 March 18, 1958 R. L. ESKEN 1 2,826,819

GAUGING DEVICE Filed Feb. 25, 1955 2 Sheets-Sheet 2 "I i i l IN V EN TOR.

By J

nite tates GAUGING DEVICE Robert L. Esken, Dayton, Ohio, assignor, by mesne assignments, to The Sheffield Corporation, a corporation of Delaware Application February 25, 1955, Serial No. 490,568

11 Claims. (Cl. 33-174) This invention relates to gaging apparatus and more specifically it relates to an improved apparatus for ganging the dimensional characteristics of the raceways of a double row ball hearing.

.In gauging the inner or outer ring or race of a precision double row ball bearing for selective assembly with other bearing components, interrelated dimensional characteristics of the raceways must be considered. These dimensions include the raceway diameters as measured across the center of the bearing race, the raceway radii and the relative axial spacing of the raceways or the straddle.

It is an object of the present invention to provide an apparatus for gauging the dimensional characteristics of part surfaces such as the raceways of a double row bearing race, the apparatus being simple in construction and operation and useful for accurate response in a single gaging operation to those raceway dimensions which cooperate with other bearing components in an assembled bearing.

It is a further object to provide such an apparatus wherein cooperating gauging members or supports are carried for relative movement into association with the raceways of a double row bearing race and are relatively positioned in gauging in accordance with the axial spacing or straddle between the raceways and the dimensional characteristics of the raceways themselves, gauging means being provided cooperating between the members and responsive to the dimensional characteristics of the raceways which determine the cooperation of the raceways with other components of an assembled bearing.

It is a further object to provide such an apparatus wherein each gauging membercarries and retains a pair of balls for engagement, one with each of the raceways at opposite sides of the race, the extent of each pair of balls beyond the associated member being varied in accordance with the relative axial spacing of the balls along the bearing axis while in engagement with the raceways, whereby the gauging members assume limited relative positions determined by both the raceway dimensions and the axial spacing between the raceways along the race.

It is a further object to provide such an apparatus wherein each pair of balls engages an inner cam surface having a curvature centered at the intersection of contact angles of the adjacent raceways of a nominal race whereby the balls are urged in gaging against the raceways at contact points and under substantially the same conditions as occur in the assembled bearing.

It is a further object to provide such an apparatus wherein gauging means cooperate between the gauging members or supports, the gauging means comprising a fluid leakage orifice and an opposed orifice controlling surface whereby the leakage from the orifice is controlled by the dimensional characteristics of the raceways.

Other objects and advantages will be apparent from the following description, the appended claims, and the accompanying drawing in which,

Figure l is a view of the forward face of an instrument for gauging outer bearing rings or races and embodying the present invention, shown in partial section,

Figure 2 is an end view, also in partial section, of the instrument in Figure 1,

Figure 3 is an enlarged detail of the gaging members or supports of Figure 2,

Figure 4 is a sectional view of the retaining structure for the gauging balls taken on line 44 of Figure 3,

Figure 5 is a fragmentary view of a second embodiment of this invention provided for gauging the dimensional characteristics of an inner bearing race,

Figure 6 is a side view of the'instrument in partial section along line 6-6 of Figure 5, and

Figure 7 is an. enlarged detail of this second embodiment. I

The apparatus of the present invention is one which is provided for simultaneously gauging those inter-related dimensions of a part which determine its cooperation with other parts in an assembled unit and provides a single response indicative of these characteristics. The critical dimensions of the raceways of a double row ball bearing race include the diameter of each raceway measured across the center of the race, the raceway radii, and the axial spacing or straddle of the raceways along the axis of the race. The particular instruments illustrated for the purpose of disclosing the present invention are responsive to these dimensions of an outer or an inner race of a double row bearing.

Gauging members or supports are provided which are relatively moveable toward and from opposite sides of the race being gauged. If a pair of gauging members are provided they are relatively moveable along a line substantially diametral to the race and toward and from diametrically opposite sides thereof. Each of the supports carries a pair of gauging balls, one for engagement with each of the raceways at one side of the race. Be-

cause of this, the supports will be relatively positioned in accordance with the diameter of the raceways and the raceway radii. In the apparatus of the present invention when the balls are carried into engagement with the raceways, they are relatively spaced or spread along the axis of the race in accordance with the axial spacing or the straddle between the raceways which they engage. Each of the supports provides an inner surface engaging the inner faces of the balls in such a manner as to vary the extent of the balls from the associated support in accordance with their axial spacing. This results in a further variation between the limited positions of the supports in accordance with the axial spacing between the raceways. Thus, the relative positions of the supports in gauging is determined by those intor-related characteristics which will determine the available ball space and the cooperation of the raceway with the other components of the bearing. A gauging means is provided responsive to the relative positions of the supports and to these characteristics.

The particular instrument shown in Figures 1 to 4 gauges outer bearing races and includes an integral base 10 upon which the other components of the apparatus are mounted. A first gauging support 11 is fixedly mounted on the base 10 in adjusted vertical position by means of a screw and slot arrangement indicated at 15. Immediately below the gauging support 11 a second gauging support 12 is adjustably mounted by a similar screw and slot arrangement 16 on a gauging arm 17 pivoted for swinging movement about the axis of a shaft 18 carried from the base 10. The gauging arm 17 can be'manually swung about its pivot axis by means of a handle 20.

The upper support 11 carries a pair of

gauging balls

24 and 25 provided for engagement. with the raceways of 'theouter race. The lower support 12 similarly carries a pair of gauging balls 26 and27". In practice, the handle 20 israised to close the supports 11 and'12 toward one another and an outer bearing race, such as that indicated at 29 in'Figure 3, is placed over the supports. When handle 20 is released the gauging arm 17 and support12 will lower, urging the respective pairs of

gauging balls

24,25,'26 and 27 into engagement with the raceways at diametrically opposite sides of the race and. the relative positions of the supports 11 and.12 will be determined by the dimensional characteristics of the raceways epgage'd.

Adjustableguide'bars46.and47 are provided to aid in locating orr'the-forward face of the instrument.

Each pairof gauging balls is carried for free rotation initsrespective support and for free relative movement along the support substantially along the axisofthe bearingrace. "'Each set of balls is retained laterally by' side plates, indicatedat 30 and 31 in Figure 4. The .side plates have 'inwardlyextending projections as indicated at 32 and *33ccoperatingwith the outer portions or the balls to retain them within the support.

lathe-particularapplication illustrated in Figures 1 to 4, theinner surfaces of the pair of'balls 24-and'25 is engagedby a curved surface35 provided on an insert36 in the support 11. The'inner surfaces of balls 26 and 27aresimilarlyengaged by a'curved surface 381 on an insert within the support 12. The surfaces 35'and38 are similarly formed and the surface '35, for example, is arcuate about a center at the vertex of the contact angles of the balls in anorninal bearing race. In the specific illustrated application, because this vertex wouldbe outside thebearing, the bearing-is described as having a "diverging contact angle. This invention is also applicable togaugingcomponentsof a bearing having a converging contact angle. The

surfaces

35 and 38 will urge thegauging balls into contact with the raceways at the proper angleand at theproper contact points.

As the gauging balls' 24,25; 26 and 27 are urged into engagement with the' raceways, their relative spacing within their respective supports and'along the axis of the bearing race will'be determined by the axial spacing of the raceways themselves, or the raceway straddle. For example, if the balls'arespread from the positions they assume in Figure 3, they -Will ride upward on the'curve'd

surfaces

35 and 38 and willextend further from the adjacent surfaces'of their'respective' supports. It will accordingly be seen that the relative positions of the supports 11 and 12 in gauging 'willbe determinednot only by the diameter of the raceways, the raceway-radii, but also by the straddle distance therebetween.

The relative position ofthesupports 11 and 12 at their limited relative movement while in engagement with the raceways of the race29, isggaged in order to determine the dimensional characteristics of the raceways,'of the outer race. While other suitable gauging meanscan be employedyin the particular application illustrated, air leakage type gaugingstructure-is utilized. A fluid leakage orifice 40 connected through a coupling-11 to a source of air under pressure and an-air gauge, opens through the upper surface of a 'block42 mounted on the base -at a fixeddisposition relative to the. support 11. An opposed orifice controlling surface45isxcarried'byl the outer end of the pivotally mounted gaugingarmlTand is positioned thereby to control the amountof fluid leaking through the orifice 41' inaccordancewith the relativepositions of H the supports 11 and.12. .Anassociatedjgauginginstrw ment can be-suitablycalibrated and, for example, can be calibrated in terms ofinnerraceswhich have. been=previouslygauged through a similar .operation .andp1aced into classified groups.

4 The shorter the straddle distance provided by the raceways of the race 29 the greater will be the ball space available. Ignoring the other dimensional characteristics of the raceways for the moment, as the straddle distance increases, the pairs of

balls

24, 25 and 26, 27 will spread apart, ride upward on their cooperating

surfaces

35 and 38, and extend further outward of the supports 11 and 12. Thus, the limited relative positions of the supports 11 and 12 will occur in increasingly smaller relative displacements with :increases in the straddle distance. correspondingly the orifice controlling surface-45 will have a greater clearance relative to the orifice40 and an increase in leakage will occur.

The larger the diameter of'the bearing raceways measured across thecenter of an outer race, the larger the ball space, and increases in diameter will cause an increase in flow through orifice 40. The smaller theraceway diameters of the outer race, the less the ball space and the less.the leakage through. orifice 40. The greater the actual transverse radius of curvature of the raceways, the greater the ball space and as the balls correspondingly move toward each other the supports willmove outward and increase theflow through. the orifice.

Itwill accordingly be seen that .those conditions which provide increase ordecrease .inthe ball space in an assembled hearing are each..indicated by a resultant increase or decrease inlflow throughthe orifice 40 and the associated gauginginstrument will accordingly respond with a single reading to these interrelated bearing dimensions.

The' instrument of Figures 5 to 7 is one which applies the principles ofthe present invention to the gauging of an inner bearing race 50 which, in this instance, is to be utilized withfthe outer racel29 in. an assembled bearing having a diverging contactangle. Pairs of gauging

balls

51, 52 and 53,154 are respectively carried by a pivotably mounted gauging arm'55 and an adjustable supportiifi. Arm 55 is resiliently biased downward by a tension spring 62.

The pair of gauging balls '51 and. 52 are retained between a back plate 57 andadepression 58 in the rearward surface of retaining plate 59. .The balls are freely rotatable and arefree'for relative movement but are loosely restrained by retaining

pins

60 and 61 passing through retaining 'plate59 and into back plate 57. The pair of balls'53,'54 on adjustable. support56 are similarly carried between a back plate'64 and a retaining plate 65.

A cylindrical surface .67 on. a forward .extension- 68 of back plate 57 engages and urges the

balls

51 and 52 into contact with the raceways at substantially the contactpoints and.contact angles which occur in the assembled bearing. Balls 53and54. are similarly engaged and urged into engaging contact with the raceways by an extension 70.0:1' back plate'64. During gauging a l'flCGTlS appliedbetween .the ball pairs to a position within the instrument limited by an adjustable locating bar 72. The gauging operation is the same as for the modificationpreviously described and gauging arm 55 is positioned'relative'to support 56 in accordance with the raceway dimensions andthe axial straddle therebetween. The leakage through orifice will be determined by these interrelated raceway characteristics and indicated by-a flow measuring instrument 76 of the column type. In such an-exemplary system air under regulated pressure passes upward through an internally tapered transparent'fiow tubeand tothe orifice 75, positioning an indieatingfloat along the length of the tube in accordance with'the velocity of leakage through the orifice.

"Whilethe forms of apparatus .hereindescribedcons'titutepreferred.embodiments of thehinventiou, it isto bBsllfldBIStOOdrlhflti116. invention is not limited to the precise formsherein. disclosed, and that changes may be made therein without departing from the scope. ofthe invention which :is defined intheappendedttzlaims.

asse s is 1 What is claimed is:

1. An apparatus for gauging the dimensional characteristics of the raceways of a double row ball'bearing race, said apparatus comprising: a base, a plurality of gauging supports, means mounting said supports, on said base for relative movement in gauging, a pair of race way engaging balls carried by each support for engagement with the raceways at opposite'sides of a race to be gauged, each pair of balls being carried for bodily movement relative to one another axially of a race supported in gauging position and arranged adjacent one another, one for engagement with each raceway of a race to be gauged, each support having a portion cooperating with the associated pair of gauging balls whereby the supports are relatively positioned when the balls engage the race during gauging in accordance with the raceway dimensions and the axial spacing between the raceways, and gauging means responsive to the relative position of the supports in gauging.

2. An apparatus for gauging the dimensional characteristics of the raceways of a double row ball bearing race, said apparatus comprising: a base, gauging sup ports on said base, means mounting said supports from said base for relative movement in gauging, a pair of raceway engaging balls carried by each support, each support including ball holding means out of which the associated pair of balls extends, one for engagement with each of the race-ways of a race to be gauged and in which the balls are carried for free rotation and bodily movement relative to one another substantially along the axis of a bearing race supported in gauging position in accordance with the axial spacing of the engaged raceways, each of said holding means having an inner cam surface engaging the ball pair to vary the extent of the balls beyond the surface of the respective support in accordance with the relative spacing of the balls in the holding means, means in said apparatus for relatively urging said supports to limited relative positions as determined by the engagement of the pairs of balls with the raceways and the relative spacing of each pair of balls within its respective support, whereby the supports are relatively positioned in accordance with raceway dimensions and the axial spacing between the raceways, and gauging means cooperating between said supports and responsive to the relative positions thereof as determined by the dimensional characteristics of the raceways gauged.

3. An apparatus for gauging the dimensional characteristics of the raceways of the double row ball bearing race, said apparatus comprising: a base, gauging supports on said base mounting said supports from said base for relative movement toward and from opposite sides of a bearing race being gauged, a pair of raceway engaging balls for each support, each support including ball holding means out of which the associated pair of balls extends for engagement with the raceways of a race to be gauged and in which the balls are carried for free rotation and bodily relative movement substantially along the axis of a bearing race in gauging position in accordance with the axial spacing of the raceways, each of said holding means having an inner cam surface having a curvature centered at the intersection of the nominal contact angles of the adjacent raceways and engaging the inner ball surfaces to extend the balls relative to the respective support in accordance with the relative spacing of the balls in the retaining means, means in said apparatus for relatively urging said supports to limited relative positions as determined by the engagement of the pairs of balls with the raceways and the relative spacing of each pair of balls within its respective support, whereby the supports are relatively positioned in accordance with the raceway dimensions and the axial spacing between the raceways, and gauging means cooperating between said supports and responsive to the relative posi- 6? tions thereof and the dimensional characteristics of the raceways gauged.

4. An apparatus for gauging the dimensional characteristics of the raceways of a double row ball bearing race, said apparatus comprising: a base, a pair of supports, means adjustably fixing one of said supports on said base, means carrying the other of said supports for movement relative to the first support along a line substantially diametral to a bearing race being gauged, a pair of raceway engaging balls for each support, each support including holding means out of which the associated pairof balls extends for engagement with the raceways of a race to be gauged and in which the balls are carried for free rotation and bodily relative movement substantially along the axis of a bearing race supported in gauging position in accordance with the axial spacing of the engaged raceways, each of said holding means having an inner cam surface urging the balls into engagement with the races at a predeterminedcontact angle and operative to vary the extent of the balls relative to the respective support in accordance with the relative spacing of the balls in the holding means, means urging the movable support along its line of movement and relative to the fixed support to a limited position as determined by the engagement of the pairs of balls with the raceways and the relative spacing of each pair of balls within its respective support, whereby the supports are relatively positioned in accordance with the raceway dimensions and the axial spacing between the raceways, and gauging means cooperating between said supports and responsive to the relative positions therebetween in gauging.

5. An apparatus for gauging the dimensional characteristics of the raceways of a double row ball bearing race, said apparatus comprising: a base, a pair of supports, means adjustably fixing one of said supports on said base, means mounting the second of said supports on said base for movement relative to the first support whereby the supports are relatively moveable toward and from opposite sides of a bearing race being gauged, means urging the second support toward gauging position, a pair of raceway engaging balls for each support, each support including holding means out of which the associated pair of balls extends for engagement with the adjacent raceway surfaces of a race to be gauged and in which the balls are carried for free rotation and bodily relative movement substantially along the axis of a bearing race supported in gauging position in accordance with the axial spacing of the engaged raceways, each of said holding means having cam surface engaging the inner surfaces of the balls to urge the balls into engagement with the raceways and to vary the extent of the balls relative to the respective support in accordance with the relative spacing of the balls in the retaining means, said supports assuming relative positions in gauging as determined by the engagement of the respective pairs of balls with the adjacent raceway surfaces and the relative spacing of each pair of balls within its respective support, whereby the moveable support is positioned relative to the fixed support in accordance with the raceway dimensions and the axial spacing between the raceways, and gauging means cooperating between said supports and responsive to the relative positions therebetween in gauging and the dimensional characteristics of the raceways.

6. An apparatus for gauging the dimensional characteristics of the raceways of the double row ball bearing race, said apparatus comprising: a base, gauging supports, means mounting said supports from said base for relative movement toward and from opposite sides of a bearing race being gauged, resilient means relatively urging said supports toward gauging position, a pair of raceway engaging balls for each support, each support including ball holding means out of which the associated pair of balls extends for engagement with the adjacent raceway surfaces of a race to be gauged and in which the agszmara balls :are teorrie'd' for: free rotationand bodily *rivlativc! movement substantially along the axis of a sbearingwace supported =in=ganging position in accordance' with' the' axial spacingo'f the engaged raceways, each of said holding means having an inner cam -surface engaging the inner ball surfaces to urge the balls intoccontaet with the raceways ataipredetermined contact angle and to vary the extent of the bal'ls-relativeto the respective holding means in accordance with the relative spacing of the balls; whereby the supports are relatively posit-ionediin accordance with the raceway dimensions and the 'ax'ial distance between the mccways, anda fiuid leakage-orifice controlled bythe relative gauging position of said' supports adaptedforconnection toza fiuid gaugingmeans. i

'7. An apparatus for gauging the dimensional charao teristics of the 'racewaysof an outer-racer ofza double row ball bearing characterized by --a diverging contact angle, said apparatus comprising: a base, apair o'f gauging-supports, =means 'adjusta'bliy fixing one of said supportsonsaid'basqa gauging armysaid gauging arrn= being mounted on said base for pivoting movements, means adjustably mounting the second of 'said supports at the outer end of said gauging arm for swinging movements toward and from the fixed support along a.linesubstantially diametral to a bearing race being gauged whereby the supports can be relatively expandedinto gauging position, a pair of raceway engaging balls for each support, each support including ball holding'rneans out of which the associated pair of balls extends for engagement with the raceways of a race to be gauged and in whichthe-balls areicarried for free-rotation and the relative movements-substantially along the axis of a bearing race supported in gauging position in accordance withzthe axial spacing'of the raceways which they engage, each ofsaid retaining means having an inner cam surface of concave contour engaging the balls tovary the: extent of the balls in'accordance with the relative spacing of the balls in the retaining means, said gauging arm and the pivotally carried support being urged away from said fixed support to limited relative positions as 'determined by the engagement of the pairs oftballs with the respective raceway surfaces and the axialspacing of each pair of balls within its respective support, whereby the gauging arm is positioned in accordance with the raceway dimensions-andthe axial distance between the raceways, and gauging means cooperating between said gauging arm and-said base and responsivc v to the relative positions therebetween in gauging and thedimensional characteristics of theraceways.

8. An apparatus for gauging thetdimensional characteristics: of the raceways of an inner race double row'ball bearing characterizedby-a diverging contact angle, said apparatuslcomprising: a base, a'pair of gauging supports, means adjustable fixing a first of said supports onsaid base, rneans pivotally mounting the-second of said supports for. relative movementtowardaand.from the fixed support along a-line substantially diametral tola bearing race being gauged whereby the supports are moved'toward one another to gauging position, a pair of raceway engagingtballsfor each support, each support includinglball holdingmeansout of whichithe associated pair of balls extends for engagement with theadjacent surfaces of the raceways ofa race to be gauged and in which the balls arecarried for free rotation and relative movements substantiallyalong the axis of a hearing race supported in gauging position in accordance'with the'axial spacing of the raceways engaged, each of said: retaining means having an inner cam surface of convex contour, engaging the balls to vary the extent of the balls'in -aceordance with the relativet spacing tof'ithe balls, in the holding means, means: innsaid aappamtus urging i the =pivotally monnted support :toward lthe fixedsupportaand to a limited positionzrelativesthereto'as idetcrminedliby l the: en gagementl of theupairs' of 'balls widiithe adjacentraceway-surfaces and the{relativetspacingtof each pair. of balls within, its respective-support, whereby theisupports are relatively positioned in zacoordanceuwith raceway dimensions and the axialsspacing :between{ the: raceways, gauging means cooperating betweenzsaidisupportsnsaid .gauging means comprising apair of cooperating-"gaugingcomponents oomprisingga :fluid leakage rorifice wand an opposed orifice controllinglsurface, one :ofasaidcomponents 'being'fixedly mountedmn saidibase and 'the'otherbeing carried' by said pivotally;mountedisupportziwhereby therorifice and opposing surface'larezrelatively positioned-1iii-accordance with the dimensionalccbaractenistics of the raceways, said ,orifice being adapted for connection :toza source ofiluid under :pressnreandaia gauge.

9.v An apparatus for gauging dimensional characteristics of the racewayszof ludouble rowball bearing race comprisingn-base, auplurality .of gauging supports, means mounting ,said'supports -on..said base on opposite sides of ;the axis-lofts race tocbezgaugedand for relativemovement toward .andrfrom one another transverse said axis in gauging -a pair of raceway engaging balls for each supporngball retaining-means:foreach support loosely carrying-dime; respective .painofrballs, one for. engagement with :each :raceway wot a race, :and for bodily floating movementitgenerally.axiallylotsa race in gauging position, each retaininglmeans .includinglcontact meansurging each ball into positioning engagement with the respective raceway at;a predeterminedrcontact; angle, and'gauging means responsive to..the relative positions of the supports in au n 11.0. An apparatus 535 rsetsforth, inclaim 9, wherein said contact means providesa ba llzengaging surface having a curvature centered ;atzthe vertex; of the nominal contact angleofitherace beinggaugcd.

1 'Anapparatus o caus ng dimensional charac eristics of the-raceways of adoublerow ball bearing race mp isingscoap ur y au n suppo t means mountingsaid sppportson saidbase for relative movement towardandtfrom lth71j216VgS of, arace to begauged and generally-transversecthe axisnthereof, a pair of raceway engaging balls for each support, ball retainingmeans for each support marrying .therespective pair of balls for simultaneous positioningengagement with the raceways in a commomplanetincluding the axis of the race being gauged, the balls of each pair beingvcarricd for free rotationsand relativemovement generally axially of a race in gauging position, .each retainingmeanshaving inner cam surface mcansinclinedrelative to the race axis and engaging-each ballto-vary the extent of the balls in accordance withrthe relativelball positions as determined by the raceway-spacingand dimensions, and gauging means responsive to-the relativepositions of the gauging supports.

References/Cited, in the file of this patent "UNITED STATES PATENTS 1,423,542 Rockwell, July 25, 1922 1,550,621 Braultl Aug. 25, 1925 2,024,020 Aldeborgh -Dec. 10, 1935 2,246,485, A1ler.- June 17, 1941 2,631,378 Wynne Mar. 17, 1953